Models or DGNS which is better?

Multiple DGNs is the recomennded way to work, and it's my preference.

I keeps the file from getting too large - by the time you have all of your design and your corridors and your terrains and everything else, I think that would make the file slower and less stable.

Mike also mentioned a couple of good points, and the big one for me is that keeping the data federated means that more of the data is protected from corruption. If everything is in one file, and something happens to that file, everything is lost. If things are kept separate, we'd only lose that one chunk of data while everything else is untouched.

That being said, There's wiggle room depending on the project. For something small like a single cul-de-sac, I would probably keep that all in one file. I keep my medians in a separate file from my roadway, but I don't have a separate file for every median; the same with driveways. My roadway drawing may have more than one corridor (backbone, sideslopes) For longer projects, I try to keep everything split into one mile regions so I might have RoadCorridorR1, MediansR1, DrivewaysR1, RoadCorridorR2, etc.

I am convinced that having things split up is the best way to do it. I makes more drawings, but it also makes it easier to reference only the parts I need while protecting my data from getting all hosed at once.

Multiple DGNs is the recomennded way to work, and it's my preference.

I keeps the file from getting too large - by the time you have all of your design and your corridors and your terrains and everything else, I think that would make the file slower and less stable.

Mike also mentioned a couple of good points, and the big one for me is that keeping the data federated means that more of the data is protected from corruption. If everything is in one file, and something happens to that file, everything is lost. If things are kept separate, we'd only lose that one chunk of data while everything else is untouched.

That being said, There's wiggle room depending on the project. For something small like a single cul-de-sac, I would probably keep that all in one file. I keep my medians in a separate file from my roadway, but I don't have a separate file for every median; the same with driveways. My roadway drawing may have more than one corridor (backbone, sideslopes) For longer projects, I try to keep everything split into one mile regions so I might have RoadCorridorR1, MediansR1, DrivewaysR1, RoadCorridorR2, etc.

I am convinced that having things split up is the best way to do it. I makes more drawings, but it also makes it easier to reference only the parts I need while protecting my data from getting all hosed at once.